DOVER-FOXCROFT, Maine — A local man accused of killing his brother during an altercation was indicted on murder charges Thursday by the Piscataquis County grand jury.

Steven T. Mayo, 22, is charged in the fatal shooting of his brother Ryan Mayo, 20, on May 1 during an altercation on French Road, where the brothers lived. Police said Steven Mayo had returned home to find that Ryan Mayo had damaged his property with an all-terrain vehicle. Upset over the damage, police said, Steven Mayo shot his brother in the head with a 70-year-old Russian rifle and bullets that he had obtained by trading in a stereo amplifier.

The case was presented Thursday by Assistant Attorney General Andrew Benson.

The State Medical Examiner’s Office ruled that Ryan Mayo, a young father, died of a gunshot wound to the “head and brain.”

Steven Mayo, who was indicted on charges of murder and depraved indifference murder, is being held without bail in the Piscataquis County Jail. If convicted, Mayo could serve up to 30 years on each count. No date has been set for his arraignment.

According to a state police affidavit, Steven Mayo said he returned home from grocery shopping on May 1 and found his driveway torn up from an ATV. He reportedly walked to his brother’s home next door and began removing fuses from the vehicle, which was parked on the lawn. He allegedly told police that his brother had damaged his property before despite being told not to do so.

Steven Mayo said Ryan Mayo came out of his home and began chasing him and at one point Ryan Mayo used a white metal pole to hit his brother’s truck. Ryan also allegedly hit his brother in the mouth before yelling that he was going to get a gun and “blow Steven’s brains out,” according to affidavit.

Steven allegedly told police that he went and got a rifle from his home and blew out the tires of his brother’s all-terrain vehicle. Mayo said his brother then came out of his home with a shotgun and fired it. Steven told police he then shot at Ryan Mayo as he was re-entering his home.